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Remove the nr_exclusive argument from __wake_up_sync_key()

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Remove the nr_exclusive argument from __wake_up_sync_key() and derived
functions as everything seems to set it to 1.  Note also that if it wasn't
set to 1, it would clear WF_SYNC anyway.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
This commit is contained in:
David Howells
2019-10-23 17:02:34 +01:00
parent d055b4fb4d
commit ce4dd4429b
3 changed files with 9 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/exit.c
+1 -1
View File
@@ -1435,7 +1435,7 @@ static int child_wait_callback(wait_queue_entry_t *wait, unsigned mode,
void __wake_up_parent(struct task_struct *p, struct task_struct *parent)
{
__wake_up_sync_key(&parent->signal->wait_chldexit,
TASK_INTERRUPTIBLE, 1, p);
TASK_INTERRUPTIBLE, p);
}
static long do_wait(struct wait_opts *wo)
kernel/sched/wait.c
+4 -10
View File
@@ -169,7 +169,6 @@ EXPORT_SYMBOL_GPL(__wake_up_locked_key_bookmark);
* __wake_up_sync_key - wake up threads blocked on a waitqueue.
* @wq_head: the waitqueue
* @mode: which threads
* @nr_exclusive: how many wake-one or wake-many threads to wake up
* @key: opaque value to be passed to wakeup targets
*
* The sync wakeup differs that the waker knows that it will schedule
@@ -183,26 +182,21 @@ EXPORT_SYMBOL_GPL(__wake_up_locked_key_bookmark);
* accessing the task state.
*/
void __wake_up_sync_key(struct wait_queue_head *wq_head, unsigned int mode,
int nr_exclusive, void *key)
void *key)
{
int wake_flags = 1; /* XXX WF_SYNC */
if (unlikely(!wq_head))
return;
if (unlikely(nr_exclusive != 1))
wake_flags = 0;
__wake_up_common_lock(wq_head, mode, nr_exclusive, wake_flags, key);
__wake_up_common_lock(wq_head, mode, 1, WF_SYNC, key);
}
EXPORT_SYMBOL_GPL(__wake_up_sync_key);
/*
* __wake_up_sync - see __wake_up_sync_key()
*/
void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode, int nr_exclusive)
void __wake_up_sync(struct wait_queue_head *wq_head, unsigned int mode)
{
__wake_up_sync_key(wq_head, mode, nr_exclusive, NULL);
__wake_up_sync_key(wq_head, mode, NULL);
}
EXPORT_SYMBOL_GPL(__wake_up_sync); /* For internal use only */